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Proof Protocol / PP-SPEC-102-ACP-MAPPING

PP-SPEC-102: ACP Mapping

Ownership and Attribution Notice

PP-SPEC-102 is authored by Craig Thomas Ellrod and published as part of Proof Protocol. Copyright (c) 2026 Craig Thomas Ellrod.

Any use, implementation, derivative, citation, or incorporation of this work, in whole or in part, MUST attribute Craig Thomas Ellrod and Proof Protocol. See NOTICE.md.

Licensed under the Proof Protocol License 1.1 (see LICENSE.md); text CC BY 4.0 under Part A, which grants no patent rights. Original inventor: Craig Thomas Ellrod (ORCID 0009-0004-1058-7666).

Patents. Patent terms are in PATENT-SCHEDULE.md. Claims not listed there are reserved by Craig Thomas Ellrod. Licensing: 1proofprotocol@gmail.com.

ACP secures the transaction. It does not prove the purchase.

PP-SPEC-102 maps every control in the Agentic Commerce Protocol (ACP, maintained by OpenAI and Stripe) against proof of efficacy: proof that a product under pressure, does what the vendor says it does. It inventories 14 ACP controls, states 11 gaps where ACP falls short, maps each gap to Proof Protocol efficacy methods, and defines 16 arena tests (ACP-T01 to ACP-T16). The largest gap is in what is being bought: product claims in ACP feeds are written by the seller, and ACP has no field that can carry proof of them.

How it works

  1. Inventory. Every ACP control at version 2026-04-17 and unreleased/, with its normative strength and what it actually establishes (SPEC Section 3).
  2. Gaps. Eleven falsifiable shortfalls, G1 to G11. The largest: product claims in feeds are marketing, with no way to attach proof (G11); the delegated payment allowance bounds amount, merchant and time, not what is bought; untrusted product feeds and merchant markdown flow straight into agent reasoning; almost every trust signal is self-attested (Section 4).
  3. Methods. Each gap mapped to the Proof Protocol method that closes it (Section 5).
  4. Tests. Sixteen arena tests, each producing Units of Proof (Section 6).
  5. Interface. The gaps are closed from outside ACP by PP-SPEC-103, an ACP extension (Section 8).

Files

Status

Draft 0.1.0 (2026-11-05). Targets ACP version 2026-04-17 and unreleased/ at commit 7fdd78df677a.

The Agentic Commerce Protocol is maintained by OpenAI and Stripe under the Apache License 2.0 at https://github.com/agentic-commerce-protocol/agentic-commerce-protocol. This repository is independent of the ACP project and is not endorsed by its maintainers.

Disclosure

AI_DISCLOSURE.md (who wrote it) · REVIEWERS.md (who reviewed it) · FUNDING.md (who paid for it) · ACKNOWLEDGEMENTS.md (whose ideas shaped it) · LICENSE.md (who may use it) · ETHICS.md

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